Engine crashes after fracturing destructible made from merged actors

Build Type: Binary

Build version: Version: 4.14.0-3195953+++UE4+Release-4.14

Detailed description of the issue: Upon fracturing a destructible mesh that was generated from a merged actor the editor crashed with an Access violation - code c0000005. 12 meshed merged, no crash at 25 chunks, crashes at 150 chunks

Repro Steps:

  1. Make merged actor
  2. Generate Destructible from this
  3. Play Level
  4. Fracture Destructible

System Specs: Intel i7-6700 3.4GHz, 16GB RAM, 64bit Windows 10, Zotac 1060 3GB.

Edit:

150 chunks: Unreal Engine Demo 11 17 2016 12 54 37 11 - YouTube

25 chunks: Unreal Engine Demo 11 17 2016 12 53 56 10 - YouTube

Crash report: http://pastebin.com/w5TkjxK9

Hi Harry,

While trying to reproduce this on my end I’ve been unsuccessful. Using a few assets from the starter content has not worked either using any number of meshes or fracture settings. I’ll the additional information below to continue.

  • Are you able to reproduce this outside of your project in a new blank one?
  • Does the crash only happen with this mesh or any mesh you’ve created?
  • If it’s only with this mesh, ones you’ve created, or doesn’t happen with basic assets like the ones from the Modes panel can you provide a sample asset that can be used to reproduce this crash?

Thank you!

Tim

I only had a limited window to test today, I will try your suggestions tomorrow

I was able to replicate the bug, in a new project, but only with my assets.

Are you able to share the asset here or privately? If you can at least privately that would be helpful to get a ticket in for the crash with something that is reproducible. If you’re willing to share you can send to me privately on the forums via a PM.